Senior Protocol engineer

Prodapt; Sunnyvale (CA); On-site; USD 180,000 - 240,000; Full time

Job summary

Prodapt is seeking a highly skilled 5G Protocol & Certification Engineer to focus on signaling and verification of cutting-edge mobile devices in a Fremont/Sunnyvale, CA onsite role. You will develop and execute protocol test plans, perform deep-dive modem log analysis, and collaborate with OEM and network teams to drive certification closure on complex 5G features.

This role requires extensive 5G/LTE experience, strong 3GPP knowledge, and hands-on use of QXDM/QCAT/Wireshark for verification,

Qualifications

• Bachelor’s degree in CS/CE/EE or equivalent practical experience.
• 10+ years in 5G/LTE/Modem development or validation; 8+ with Master.
• 5+ years in 5G Protocol Verification or related Modem/Signaling verification.
• Strong knowledge of 3GPP Rel 15/16 and IMS signaling.
• Experience with protocol tools: QXDM, QCAT, Wireshark, ADB.
• Scripting: Python for automation and data analysis.
• Excellent communication and cross-functional teamwork.

Responsibilities

• Develop and execute protocol verification plans for 5G/LTE designs including E911, RTT, and LPPe/PIDF-LO.
• Design, develop, and maintain test environments using Keysight, Rohde & Schwarz, or Spirent simulators to verify 5G functionality.
• Create test scenarios and test cases to achieve Carrier Certification (AT&T, Verizon, T-Mobile) and 3GPP standards compliance.
• Analyze modem logs and regression results, debug signaling issues using QXDM, QCAT, and Wireshark; drive bug resolution.
• Work closely with cross-functional teams to align verification with project milestones.
• Maintain accurate documentation for verification plans, test cases, and results to support traceability and device approval.

Skills

5G Protocol Verification

Modem Signaling

Python scripting

Communication skills

Education

Bachelor's degree in Computer Science / Computer Engineering / Electrical Engineering

Master's degree in a related field

Tools

QXDM

QCAT

Wireshark

ADB

Spirent simulators

Keysight

Rohde & Schwarz

Job description

Prodapt is a global technology company and the largest specialized player in the Connectedness industry. As an AI-first strategic partner, Prodapt provides consulting, business transformation, and managed services to top telecom and tech enterprises. Prodapt ASIC Services is a leading provider of SoC ASIC/FPGA and Embedded Software services. We offer turnkey solutions, Offshore Design Centers (ODCs), and staff augmentation across key areas like RTL Design, UVM Verification, Emulation, FPGA Validation, DFT, RTL-to-GDSII, Physical Design, Mask Layout, and Silicon Bring-up. Our embedded services include firmware, device drivers, RTOS porting, and board bring-up. A “Great Place To Work® Certified™” company, Prodapt employs over 6,000 technology and domain experts in 30+ countries. Prodapt is part of the 130-year-old business conglomerate The Jhaver Group, which employs over 32,000 people across 80+ locations globally.

Prodapt is seeking a highly skilled 5G Protocol & Certification Engineer to focus on the signaling and functional verification of cutting-edge mobile devices, ensuring they meet stringent carrier and emergency service requirements. In this role, you will develop and execute protocol test plans, perform deep-dive modem log analysis, and collaborate closely with OEM and network teams to drive certification closure on complex 5G features in Fremont/Sunnyvale, CA onsite role

Role and Responsibilities

• Develop and execute comprehensive protocol verification plans for 5G/LTE designs, including defining test strategies for E911, RTT, and LPPe/PIDF-LO protocol
• Design, develop, and maintain test environments using Keysight, Rohde & Schwarz, or Spire nt simulators to verify 5G functionality, mobility, and IMS feature
• Create complex test scenarios and test cases to achieve comprehensiv e Carrier Certificati on (AT&T, Verizon, T-Mobile) and 3GPP standards compliance
• Analyze modem logs and regression results, debug complex signaling issues using QXDM, QCAT, and Wiresha rk, identify root causes, and drive bug resolution
• Work closely with cross-functional teams, including Modem SW, Architecture, and Carrier Labs, to align verification efforts with project milestone
• Maintain accurate and up-to-date documentation for verification plans, test cases, and results to support traceability and final device approval

Requirements

• Bachelor’s degree in Computer Science, Computer Engineering, Electrical Engineering, or a related technical field; or equivalent practical experience
• 10+ years of industry experience with a Bachelor’s, or 8+ years with a Master’s in relevant domains of 5G/LTE/Modem development or validation
• 5+ years of hands-on experience in 5G Protocol Verification or closely related Modem/Signaling subsystem verification
• Strong proficiency in 3GPP Standa rds (Rel 15/16) and IMS Signaling for block-level and/or system-level verification
• Experience with industry-standard protocol tools (QXDM, QCAT, Wireshark, ADB) and coverage-driven certification flows
• Proficiency with scripting languages such as Python for automation, regression management, and data analysis
• Demonstrated strength in modem debugging, root-cause analysis, and driving verification closure for E911/Location Services
• Excellent communication and interpersonal skills, with the ability to work effectively in a collaborative, cross-functional environment